PERTH AMBOY — Perth Amboy police say an Edison man robbed four women in separate incidents, two of them while the victims were walking with small children and one in which the woman was threatened with gun and punched in the face.

Wilfredo Albino Pagan, 24, was arrested Tuesday and charged with four counts of robbery and single counts of possession of a weapon for unlawful purposes and unlawful possession of a weapon.

The string of robberies began March 14 when a man approached a woman walking near in the 400 block of State Street about 8:45 p.m. He pulled the chain off her neck and pushed her to the ground, police Capt. Luiz Guzman said.

Six days later, on March 20, a man approached a woman in a car in the rear of a Smith Street property about 3 p.m.. He asked her to roll down her window, then put a gun to her neck, grabbed her chain, punched her in the face and fled the area, Guzman said.

About four hours later, at 7 p.m., a woman walking on Maple Street with her child was approached by a man who pushed the child to the side and grabbed her purse and fled, the captain said.

On May 11, a woman pushing a stroller on Elm Street at 4:05 p.m. when a man came up from behind, ripped a chain from the woman's neck and ran away, Guzman said.

He said Detective Sandra Rivera gathered evidence leading to Pagan's arrest.